using more recent ffmpeg + code cleanup

docker-build.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# THANK YOU TALULAH (https://github.com/nottalulah) for your help in figuring this out
+# and also optimizing some code with this commit.
+# xoxo :D
+
+set -xeuo pipefail
+
+case $(uname -m) in
+  x86_64)
+    ARCH=amd64;;
+  aarch64)
+    ARCH=arm64;;
+  armhf)
+    ARCH=armhf;;
+  armv7)
+    ARCH=armel;;
+  armv7l)
+    ARCH=armel;;
+  *)
+    echo "Unsupported architecture: $(uname -m)"
+    exit 1
+esac
+
+wget "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-$ARCH-static.tar.xz" -O ffmpeg.txz
+mkdir /tmp/ffmpeg
+tar xf ffmpeg.txz -C /tmp/ffmpeg
+cp /tmp/ffmpeg/*/ffmpeg /usr/local/bin/ffmpeg
+cp /tmp/ffmpeg/*/ffprobe /usr/local/bin/ffprobe
+rm -rf /tmp/ffmpeg ffmpeg.txz